摘要
研究了污染河水混凝絮体形成动态膜的过程及其对污染物的去除效果,以无纺布为附着基材,受污染河水为研究对象,聚合氯化铝为混凝剂,通量稳定作为动态膜形成的依据,通过运行时间(t)、累计出水体积(V)及t/V、通量之间的关系研究动态膜的成膜过程及对污染物的去除效果.结果表明,4和8cm水头运行时动态膜形成时间分别为120和70min,成膜后通量基本一致.动态膜的形成首先是小于或等于基材孔径的颗粒被截留,然后为小于基材孔径的颗粒在膜内部通道堵塞或沉积.污染物去除效果COD去除率约为75%～71%,总磷去除率约为81%,出水粒度分布表明动态膜对颗粒物有较好的截留作用.
Based on the relationship of operation time （t）, accumulative effluent volume （V）, t/V, and flux rate, the dynamic membrane formation and pollutants removal were investigated. In this reactor, contaminated river water was treated when non-woven fabric material was used as support medium and polyaluminum chloride selected as an effective coagulant. The results showed that the dynamic membrane formation time was 120 min at 4 cm water head drop, and 70 min at 8 cm one, the stabilized flux was similar. In the formation of dynamic membrane, the support medium was firstly covered with bigger particles than its aperture, then the jam and sedimentation of smaller particles in the cores. The pollutant removal showed that COD removal rate was 75%～71%, and the total P about 81%, the dynamic membrane had better particle removal capability.
出处
《过程工程学报》
CAS
CSCD
北大核心
2009年第1期33-37,共5页
The Chinese Journal of Process Engineering
基金
济南市科技局重点项目(编号:061075)
关键词
混凝
动态膜
污染河水
形成过程
无纺布
污染物去除
coagulation
dynamic membrane
contaminated river water
formation process
non-woven fabric
pollutant removal
